A method and apparatus is disclosed for controlling actuation of an air bag restraint system. The apparatus includes a sensor securable to the vehicle for providing a vibratory electric signal having various frequency components indicative of whether the vehicle is in a deployment condition. The particular...http://www.google.co.uk/patents/US5034891?utm_source=gb-gplus-sharePatent US5034891 - Method and apparatus for sensing a vehicle crash with frequency domain boost
